Grinding and polishing machine



I (No Model.)

A. MANEOKE. GRINDING AND POLISHING MACHINE.

No, 479,822. Patented Aug. 2, 1892.

ATLE INVENTOR (9 0VL M J35 ALB-E RT MANECKF.

m: Noam: areas on, mum-Inna, msumcmn o c UNI-TED STATES PATENT OFFICE.

ALBERT MANEOKE, OF OERRO GORDO, ILLINOIS.

GRINDING AND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 479,822, dated August2, 1892.

Application filed October 10, 1891. $e1'ial No. 108,351. (No model.)

To all whom it may concern:

Be it known that I, ALBERT MANEcKE, of Oerro Gordo, in the county ofPiatt and State of Illinois, have invented certain new and usefulImprovements in Grinding and Polishing Machines, of which the followingis a specification.

This invention is in the nature of an improvement on the device setforth in Letters Patentof theUnited StatesNo. 439,300, gran ted to me onthe 28th day of October, 1890, for a grinding and polishing machine. Itrelates to the manner of getting power to the grinding-wheels, to themeans employed to obtain yielding adjustment in such wheels, and to themanner of tightening the belt.

It consists in the details of construction and combinations of partshereinafter set forth and claimed.

In the drawings accompanying and forming a part of this specification,Figure l is a side elevation of my device, illustrating the manner ofrunning a single belt from the countershaft to the shaft of thegrinding-wheels and showing the means for tightening the belt. Fig. 2 isa plan of the grinding-wheels and bearings; and Fig. 3 is a section onbroken line a: in Fig. 2, the two last figures being illustrative of themeans employed to obtain yielding adjustment of the wheels.

The belt 1 extends from the drive-pulley on the counter-shaft aroundidlers 2 and 3 to the pulley 21 of the shaft of the grinding-wheels. Thehanger depends from the counter-shaft and sustains sleeve 5, which isadj ustably secured to the hanger by means of set-screws 6, and whichhas the bracket 7, adapted to embrace the swinging frame of the grindingdevice. Frame 9 pivots at 8 in bracket 7. It extends downward to 10,where it provides bearin gs for the shaft of idler 3, and thence upwardand backward to shaft 11 of idler 2, where it provides boxing for suchshaft. Block 12 is rigidly secured to frame 9 and is pivotally connectedwith plate 14. Side bars 13 and 13 are secured to plate 14 and extendingrearwardly beyond the wheels connect with or form manipulating-handles.Frame 16 is pivotally connected at 17 and 17 respectively, with sidebars 13 and 13. Yoke 20 has acircular boss 20 on its under surface,which extends through a corresponding hole in frame 16 and which has asquare or angular hole through its axis. Bolt 18 has the square orangular part- 18, adapted to the hole in the boss, and also has theupper threaded part provided with a nut. The head 18 of the bolt isenlarged and is provided witha transverse hole. lVasher 24 fits againstthe boss and extending beyond the sides of the same secures the yoke andthe frame together. Cross-bar 22 extends from one side bar to the otherand has at its center a rigidly-secured bolt 23, which has the boredhead 23. Spring-rod 19 has one end extending through the head of bolt 18and the other end through the head of bolt 23 and its tendency is tohold the yoke in the position shown in Fig. 2, with the boxing of thewheel-shaft resting on the side bars. The grinding-wheels 15 and 15 arecarried by the yoke and when either of the wheels is pressed against asurface not parallel with its face the spring-rod will yield upward orto either side, as may be required, and so adapt the wheel to thesurface so long as the pressure is maintained. The idlers 2 and 3 havesuch relation to pivot 8 that the inner periphcry of the one and theouter periphery of the other are always equidistant from the pivotwhatever may be the position of the grindingframe, (see the circle inbroken lines in Fig. 1,) and as a result one idler takes up what theother loses when the grinding-frame is swung up or down, thus keepingthe belt at a uniform tension. When the belt needs tightening, theset-screws 6 are loosened and the Weight of the grinding-frame isemployed to draw the belt to the desired tension. WVhen this is done,the screws are reset to make the nearer surface of idler 2 and thefarther sur face of idler3 are equidistant from the pivot, wheel-drivingpulley 21, carried by side bars connected with frame 9, and belt 1,extending around the pulley and bearing against the idlers, as setforth.

2. In grinding and polishing machines, the combination of the side barshaving the manipulatinghandles, the wheel-carrying frame connected withthe side bars in a manner permitting motion in different directions, andthe spring tending to hold the Wheel-carrying frame in a certainposition relative to the side bars, as set forth.

3. In grinding and polishing machines, the

combination of the side bars, the frame pivotally connected with theside bars, the yoke connected pivotally with the frame, and thespring-rod connected with the side bars and with the yoke, as set forth.

4. The combination of the side bars, the frame pivotally connected withthe side bars, the yoke carrying the Wheels and having a boss extendingthrough a hole in the frame, an angular bolt extended through acorresponding hole in the boss and connecting the frame and yoketogether, and a spring-rod extending through the head of the bolt andconnecting with a cross-piece of the side bars, as set forth.

In testimony whereof I sign my name in the presence of two subscribingwitnessesr ALBERT MANEOKE.

Attest: i

HENRY PRUAN, H. E. DIoKEY.

